Detector.



F. B. TURNER.

DETECTOR.

APPLICATION FILED JUNE 4,1914.

1,128,552, Patented Feb.16, 1915.

2 SHEETS-SHEET 1.

F. B. TURNER.

DETECTOR.

APPLICATION FILED JUNE 4, 1914.

mggg, PatentedFeb. 16, 1915.

2 SHEETS-SHEET 2.

amm/Mw T0 allwhom it may concern tion, reference e OFFICE- acnnsr 1a. TURNER, c1 nuu'rmero r amen, cauronum :pnrncroa Be it known that I, FOREST Ba Tunnnn, a

citizen of the United States, residing at. Huntington Beach, in the county of Orange and State of California, have invented cer-. tain new and useful Improvements in- Detectors, of which .the following is a specification, reference being had to the accompanying drawings.

This invention relates'to certain improvements in wireless telegraph receivers or oscillation detectors, and has for its primary object to provide certain improved structural features in such devices which will render the same highly sensitive to electromagnetic Waves through the medium: of which intelligence is communicated.

In its more specific aspect the invention consists in its preferred embodiment of a circularly arranged [series of crystal masses which constitute the detecting elements, said crystals being mounted upon a common conductor plate connected to one'side of the receiving circuit, and a contact member adjustably mounted upon the base whereby the same may be positioned and engaged with any one of the several crystal masses, saidadjustable contact being connected to the other side of the receiving circuit.

' The invention has for another important object to provide a particular mounting'for the adjustable contact point or needle whereby liability of the same being broken when the instrument is subjected to severe shock or jar will be obviated.

It is a further object of my invention to produce a detector or oscillation receiver for use in wireless telegraphy and telephony .which is simple and inexpensive inits con- 40- struction, may be produced at comparatively small cost, and is highly efficientan'd reliable. in practical use.

With the above and other objects in view, the invention consists in novel features of construction, combination, and arrangement of arts as will be hereinafter referred to an more particularly pointed out in the specification and claim.

For a full understanding of the invenis to be had to the following description and accompanying drawings, in wh1ch- Figure 1 is a side elevation of the improved detector illustrating the preferred embodiment thereof; Fig. 2 is a to plan view; Fig. 3 is a section taken on t e line animation c w nt Patented Feb. 16, 1915. npplicationlled June 4,1914. Serial mfsaaoes.

' 3-3 of Fig. 2; and Fig. 4: is a section taken on the line H. of Fig.1 Fig. 5 is a sect1on taken on the line 5- 5 of Fig. 1.

Referring in detail to the drawing 5 designates a base constructed of suitable insu-' lating material, .and 6 indicates binding posts which are mounted in said base at which is electrical conductivity with one of the bindlng posts 6. The conductor plate (is centrally provided with an opening indicated at 9.

10 designates a cylindrical post or rod having an enlarged base 11 which is provided with a central threaded bore to recelve the upper end of a fastening screw, or bolt 12 extending upwardly through the base 5. Between the enlarged lower end of the post 10 and the upper surface of the base 5-a disk of insulating fiber indicated at 13 is arranged around the edge. of the opening '9 in the conductor plate 7. It will be noted that the securing screw or bolt 12 is spaced from the edges of this opening and out of contact with the metal conductor plate.

Upon the plate series of cylindrical cups 14 is disposed.

Each of these cups contains a crystal mass 15 such as silicon or other analogous substance which is well known in the art as a detector element. Each of the cups 14 is rigidly secured uponthe base 5 by a bolt '16 extending through the base of the cup, a securing nut 17 being threaded upon the lower end of said bolt. An arm 18 is provided with a sleeve 19 upon one end which is loosely engaged upon the rod or post 10. This arm extends horizontally from the post and is adapted to be fixed in an adjusted position thereon by means of the setscrew 20 which is threaded in said sleeve and adapted for binding engagement with the post. The other end of the arm 18 is also formed with a sleeve 21, said sleeve 21 having a threaded bore to receive the shank 22 of an adjusting screw 23. The screw 23 is longitudinally bored to loosely receive a rod 24. Upon said rod and within the bore of .the adjusting screw a coil spring 25 is arranged, said spring bearing at its upper end 7 a circularly arranged.

' circuit terminal is connected to the binding connection with the accompanying drawing,-

the rod 24 and at its lower end upon a collar 26 on the rod 24. The upper end of the rod 24 is threaded as indicated at 27 to receive a fiber nut or collar 28. p

'29 designates a contact point or needle which is suitably secured to the lower end of the rod 24 and is preferably bent as'shown for hearing engagement uponthe detector crystals 15.

The circuit terminals 30 of the receiving aerial are connected to the binding posts 6' located up'on diagonally opposite corners of the base 5. 31 designates a wire which connects one of said latter posts 6 to the binding post with which the arm 8 of the conductor plate is engaged. A second conductor. wire 32 extends from the other post 6 to which the post upon the opposite side of the base an then to the vertically disposed post 10 whereon the adjustable contact point or needle 29 is mounted. p

From the foregoing description taken in the construction of my improved detector will be readily understood. The'detector is, of course, used in series with the usual telephone. receiver such as now commonly employed with oscillation detectors in wire telegraphy and telephony. By the provision of a plurality of the crystalline masses, and the adjustable needle contact point 29, said needle may be readily disposed inengagement upon any one of the crystal masses which may have the greatest egree of inherent sensitiveness to the electro-magnetic waves, thus permitting the operatorto ob-v tain the very best possible results. The needle point 29 maybe readily adjusted vertically in the outer end of the arm 18 by simply manipulating the screw 23 whereby its pressure upon the crystal may beregu lated as desired. By the provision of the spring 25, it will be obvious that if the instrument'is accidentally subjected to severe shock or jar, said spring will absorb such vibration and thereby prevent breakage of the needle contact point. The extent of movement of the rod 24: through the adjusts ing screw may be determined and varied by the proper adjustment of the fiber nut 28 upon the upper end of said rod. A detector What; is claimed is:

of oscillation receiverembodying the features above described,-is very servlceable and efficient in practical use and is of greater durability than. instruments of a similar character now known in the art. At the" same time, however, it will be appreciated that owing to the extremely simple construction of. my invention the manufacturing cost thereof is not increased to an materialextent. may also-be very easily and quickly assembled and disassembled when necessary for the purpose ofcleaning or repair.

' While I haye above described the pree ferred form, construction, and arrangement of the several elements employed, it willhe understood that the device is,- nevertheless, susceptible of considerable modification therein, andltherefore reserve the privilege of-resorting toall such legitimate. changes" as maybe fairly embodied within the spirit and scope of the inventionas claimed.

An electric wave detector, comprising i a conductor plate having" a radially disposed arm forme upon its peripheryto which one The several .parts of t e instrument side of the receiving circuitis connected, a

circularly arranged series of metal cups se cured upon said'plate'and each containing a wave responsive med um, an insulating base upon the upper surface of which',.said plate .is'.v v arranged, a centrally located terminal post, an insulating diskdispos'ed betweensaid post and the uppersurfaceof said plate, a a vertically disposed bolt extending through the base and threaded-into the lower endofsaid post to secure the post and the conductor plate upon the ba se, said ost being. con nected to the opposite [side 0' the receiving circuit, an arm mounted upon said post, means for ad ustmg the .arm vertically thereon and'in a: circular path, and a'res'iliently movable contact member carried by said arm forengagement upon ,the wave respone 1 sive medium in any one of said cups.

V In testimon whereof I; hereunto afiix my signature int e presence of two witnesses. FOREST-B. TURNER. fi ifo p BAR Gm. R. Nu'rr. 

